FIELD OF TECHNOLOGY
[0001] The present disclosure relates to a neutral line overlapping mechanism of a dual-power
automatic transfer switch and a dual-power automatic transfer switch including the
neutral line overlapping mechanism.
BACKGROUND ART
[0002] Automatic transfer switches with dual power supplies (ATS) can be divided into two
types according to the conversion types of neutral lines: ATS which can be converted
at the same time with other poles, and ATS of neutral lines overlap switching type
in which the load neutral pole is at least connected with the neutral line of the
first or the second power supply during the power conversion process. Overlapping
switching of neutral lines is highly valued because it avoids system instability caused
by short-time suspension of load neutral pole when ATS is switching. Many manufacturers
and research institutions have proposed the neutral line overlap switching technology.
However, for a three-position ATS (i.e., ATS with three states: the first power supply
on only, the second power supply on only and both power supply off), it is a completely
different technical scheme whether the load neutral pole is connected to the neutral
line of one of the power supplies or to the neutral lines of both power supplies in
the dual division. If it is the latter, the neutral lines may overlap for a long time
in the conversion process of ATS, so that the excessive overlapping time will cause
the misoperation of the superior leakage sensor and the adverse effect of stray current
on the system.
SUMMARY
[0003] A neutral line overlapping scheme provided by this disclosure is suitable for both
two-position ATS and three-position ATS. Its structure is simple and reliable. The
neutral line overlapping time is short and not affected by the conversion form of
ATS, which meets the system requirements.
[0004] In order to solve the above-mentioned one or more defects in the prior art, according
to one aspect of the present disclosure, the neutral line overlapping mechanism for
a dual-power automatic transfer switch is proposed, which comprises a first static
contact assembly, a first moving contact assembly, a second static contact assembly
and a second moving contact assembly.
[0005] The neutral line overlapping mechanism comprises a first tie rod assembly and a second
tie rod assembly, a first neutral pole moving contact assembly and a first neutral
pole static contact assembly, and a second neutral pole moving contact assembly and
a second neutral pole static contact assembly.
[0006] Through the cooperation of the first tie rod assembly with the first moving contact
assembly, the first neutral pole moving contact assembly and the second neutral pole
moving contact assembly and the cooperation of the second tie rod assembly with the
second moving contact assembly, the second neutral pole moving contact assembly and
the first neutral pole moving contact assembly, so as to:
[0007] When the dual-power automatic transfer switch is in the dual-split position, one
of neutral poles is in the on state.
[0008] The first neutral pole moving contact assembly and the second neutral pole moving
contact assembly do not operate when the double power automatic transfer switch is
switched off.
[0009] When a first power supply of the dual-power automatic transfer switch is switched
on, the first neutral pole moving contact assembly and the first moving contact assembly
are interlocked.
[0010] When a second power supply of the dual-power automatic transfer switch is switched
on, the second neutral pole moving contact assembly and the second moving contact
assembly are interlocked.
[0011] According to the above aspect of the present disclosure, the first neutral pole moving
contact assembly comprises a first neutral pole moving contact, a first neutral pole
moving contact bracket and a first neutral pole bracket actuating piece.
[0012] The first neutral pole moving contact is held on the first neutral pole moving contact
bracket, and the first neutral pole moving contact bracket actuating piece is connected
to the first neutral pole moving contact bracket.
[0013] The second neutral pole moving contact assembly comprises a second neutral pole moving
contact, a second neutral pole moving contact bracket and a second neutral pole bracket
actuating piece.
[0014] The second neutral pole moving contact is held on the second neutral pole moving
contact bracket, and the second neutral pole bracket actuating piece is connected
to the second neutral pole moving contact bracket.
[0015] According to the above aspects of the present disclosure, the first tie rod assembly
comprises a first power supply first tie rod and a first power supply second tie rod.
[0016] The first power supply first tie rod and the first power supply second tie rod are
connected to the first moving contact assembly and can drive the first moving contact
assembly to contact with or separate from the first static contact assembly.
[0017] The second tie rod assembly comprises a second power supply first tie rod and a second
power supply second tie rod.
[0018] The second power supply first tie rod and the second power supply second tie rod
are connected to the second moving contact assembly and can drive the second moving
contact assembly to contact with or separate from the second static contact assembly.
[0019] According to the above aspects of the present disclosure, a first neutral pole first
boss and a first neutral pole second boss are arranged on the first neutral pole bracket
actuating piece.
[0020] The first neutral pole first boss engages with the second tie rod of the first power
supply.
[0021] The first neutral pole second boss engages with the second tie rod of the second
power supply.
[0022] A second neutral pole first boss and a second neutral pole second boss are arranged
on the second neutral pole bracket actuating piece.
[0023] The first boss of the second neutral pole engages with the first tie rod of the second
power supply.
[0024] The second boss of the second neutral pole engages with the first tie rod of the
first power supply.
[0025] According to the above aspects of the present disclosure, the first neutral pole
first boss and the first neutral pole second boss are coaxially arranged and the diameter
of the first neutral pole first boss is larger than that of the first neutral pole
second boss.
[0026] The second neutral pole first boss and the second neutral pole second boss are coaxially
arranged, and the diameter of the second neutral pole first boss is larger than that
of the second neutral pole second boss.
[0027] According to the above aspects of the present disclosure, an elongated closed first
power supply first tie rod hole is provided on the first power supply first tie rod.
[0028] The first power supply second tie rod is provided with an elongated closed first
power supply second tie rod hole.
[0029] The length of the first power supply first tie rod hole is smaller than that of first
power supply second tie rod hole.
[0030] The second power supply first tie rod is provided with an elongated closed second
power supply first tie rod hole.
[0031] An elongated closed second power supply second tie rod hole is provided on the second
power supply second tie rod.
[0032] The length of the second power supply first tie rod hole is greater than that of
the second power supply second tie rod hole.
[0033] According to the above aspects of the present disclosure, the first neutral pole
first boss fits in the first power supply second tie rod hole only.
[0034] The first neutral pole second boss fits in the second power supply second tie rod
hole only.
[0035] The second neutral pole first boss fits in the second power supply first tie rod
hole only.
[0036] The second neutral pole second boss fits in first power supply first tie rod hole
only.
[0037] The length of the first power supply first tie rod hole is equal to the length of
the second power supply second tie rod hole.
[0038] The length of the first power supply second tie rod hole is equal to the length of
the second power supply first tie rod hole.
[0039] According to the above aspects of the present disclosure, the first neutral pole
static contact assembly comprises a first neutral pole static contact incoming end
and a first neutral pole static contact outgoing end.
[0040] One end of the first neutral pole moving contact is in contact with one of the incoming
end of the first neutral pole static contact and the outgoing end of the first neutral
pole static contact.
[0041] The other end of the first neutral pole moving contact can contact with or separate
from the other one of the first neutral pole static contact incoming end and the first
neutral pole static contact outgoing end.
[0042] The second neutral pole static contact assembly comprises a second neutral pole static
contact incoming end and a second neutral pole static contact outgoing end.
[0043] One end of the second neutral pole moving contact is in contact with one of the incoming
end of the second neutral pole static contact and the outgoing end of the second neutral
pole static contact.
[0044] The other end of the second neutral pole moving contact can contact with or separate
from the other one of the second neutral pole static contact incoming end and the
second neutral pole static contact outgoing end.
[0045] By changing the neutral pole from double fracture to single fracture, i.e. only one
side of the neutral pole keeps in contact, which provides the holding force of the
neutral pole at the opening position (i.e. opening limit).
[0046] It can also be understood by those skilled in the art that by widening the static
contact of the neutral pole, the opening distance is reduced, thereby increasing the
contact stroke and ensuring that the neutral pole closes before the phase poles.
[0047] In addition, the moving and static contacts of the neutral pole according to the
present disclosure can be pre-assembled into an assembly without special tools or
tooling. In this way, it has little influence on assembly difficulty and working hours.
[0048] According to the above aspects of the present disclosure, arc extinguishing grids
are not provided on the first neutral pole moving contact and the second neutral pole
static contact.
[0049] According to another aspect of the present disclosure, the first neutral pole bracket
actuating piece and the second neutral pole bracket actuating piece are integrally
formed and connected together through a first connecting post and a second connecting
post.
[0050] According to another aspect of the present disclosure, an elongated open first power
supply first tie rod slot is provided on the first power supply first tie rod.
[0051] The first power supply second tie rod is provided with an elongated open first power
supply second tie rod slot.
[0052] The length of first power supply first tie rod slot is equal to the length of the
first power supply second tie rod slot.
[0053] The second power supply first tie rod is provided with an elongated open second power
supply first tie rod slot.
[0054] An elongated open second power supply second tie rod slot is provided on the second
power supply second tie rod.
[0055] The length of the second power supply first tie rod slot is equal to that of the
second power supply second tie rod slot.
[0056] According to the above another aspect of the present disclosure, the first connecting
post is fitted in the first power supply first tie rod slot and the second power supply
first tie rod slot.
[0057] The second connecting post is fitted in the first power supply second tie rod slot
and the second power supply second tie rod slot.
[0058] The length of the first tie rod slot of the first power supply is equal to the length
of the second tie rod slot of the second power supply.
[0059] The length of the first power supply second tie rod slot is equal to the length of
the second power supply first tie rod slot.
[0060] The first neutral pole moving contact assembly and the second neutral pole moving
contact assembly are connected as a whole by an intermediate turntable (that is to
say, the first and the second neutral pole bracket actuator pieces are integrally
formed and connected together through the first and second connecting columns). The
opening position of the first neutral pole moving contact assembly corresponds to
the closing position of the second neutral pole moving contact assembly, and the closing
position of the second neutral pole moving contact assembly is limited by the contact
holding force, which also limits the opening position of the first neutral pole moving
contact assembly. On the contrary, the opening position of the second neutral pole
moving contact assembly is limited by the closing position of the first neutral pole
moving contact assembly.
[0061] The dual power automatic transfer switch according to the present disclosure can
drive ABC (three phase poles) + N1 / N2 (two neutral poles) at the same time when
switching on, and only drive its own ABC (three phase poles) when switching off. That
is, the switch can drive five switches (when switching on) at the same time or three
switches (when switching off) at the same time when switching once.
[0062] According to the present disclosure above, the structure is simple, and the neutral
line overlapping time is short and stable during conversion.
[0063] According to another aspect of the present disclosure, a dual power automatic transfer
switch is provided, which includes the neutral line overlapping mechanism as described
in various aspects above.
[0064] So far, in order that the detailed description of this disclosure can be better understood
and the contribution of this disclosure to the prior art can be better recognized,
this disclosure has summarized the content of this disclosure quite broadly. Of course,
embodiments of the present disclosure will be described below and will form the subject
matter of the appended claims.
[0065] Likewise, those skilled in the art will recognize that the concepts on which this
disclosure is based can be easily used as a basis for designing other structures,
methods and systems for carrying out several purposes of this disclosure. Therefore,
it is important that the appended claims should be considered to include such equivalent
structures as long as they do not go beyond the spirit and scope of the present disclosure.
BRIEF DESCRIPTION OF DRAWINGS
[0066] Those skilled in the art will have a better understanding of this disclosure through
the following drawings, and the advantages of this disclosure can be more clearly
reflected. The drawings described herein are only for illustrative purposes of selected
embodiments, not all possible implementations and are intended to limit the scope
of the present disclosure.
Fig. 1 shows a perspective assembly view of a neutral line overlapping mechanism of
a dual power automatic transfer switch according to a first embodiment of the present
disclosure;
Fig. 2 shows an exploded perspective view of fig. 1;
Fig. 3 shows a simplified diagram of fig. 2;
Fig. 4 shows that the neutral pole is changed from double fracture to single fracture,
and only one side keeps in contact;
Fig. 5 shows a perspective assembly view of a neutral line overlapping mechanism according
to a second embodiment of the present disclosure;
Fig. 6 shows a simplified diagram of fig. 5;
Fig. 7 shows that a first neutral pole bracket actuating piece and a second neutral
pole bracket actuating piece according to the second embodiment of the present disclosure
are integrally formed and connected together through a first connecting post and a
second connecting post;
Fig. 8 shows a perspective assembly view of a neutral line overlapping mechanism of
a dual power automatic transfer switch according to a second embodiment of the present
disclosure;
Fig. 9 shows an exploded perspective view of fig. 8;
Fig. 10 shows a simplified diagram of fig. 9;
Fig. 11 shows a perspective assembly drawing in which the first tie rod assembly and
the second tie rod assembly in fig. 8 are omitted;
Fig. 12 illustrates a first neutral pole bracket actuating piece and a second neutral
pole bracket actuating piece according to the first embodiment of the present disclosure.
DETAILED DESCRIPTION
[0067] Embodiments according to the present disclosure will be described in detail below
with reference to various drawings.
[0068] Fig.1 shows a three-dimensional assembly diagram of a neutral line overlapping mechanism
for a dual power automatic transfer switch according to the first embodiment of the
present disclosure. The dual power automatic transfer switch includes a first static
contact assembly 7, a first moving contact assembly 8, a second static contact assembly
9 and a second moving contact assembly 10.
[0069] The neutral line overlapping mechanism comprises a first tie rod assembly 1 and a
second tie rod assembly 2, a first neutral pole moving contact assembly 3 and a first
neutral pole static contact assembly 4, and a second neutral pole moving contact assembly
5 and a second neutral pole static contact assembly 6 .
[0070] Through the cooperation of the first tie rod assembly 1 with the first moving contact
assembly 8, the first neutral pole moving contact assembly 3 and the second neutral
pole moving contact assembly 5 and the cooperation of the second tie rod assembly
2 with the second moving contact assembly 10, the second neutral pole moving contact
assembly 5 and the first neutral pole moving contact assembly 3, so as to:
[0071] When the dual-power automatic transfer switch is in the dual-split position, one
of the neutral poles is on, that is, the first neutral pole moving contact assembly
3 and the first neutral pole static contact assembly 4 are in the on state or the
second neutral pole moving contact assembly 5 and the second neutral pole static contact
assembly 6 are in the on state.
[0072] When the dual power automatic transfer is switched off, the first neutral pole moving
contact assembly 3 and the second neutral pole moving contact assembly 5 do not operate.
[0073] When a first power supply of the dual-power automatic transfer switch is switched
on, the first neutral pole moving contact assembly 3 and the first moving contact
assembly 8 are interlocked.
[0074] When a second power supply of the dual-power automatic transfer switch is switched
on, the second neutral pole moving contact assembly 5 and the second moving contact
assembly 10 are interlocked.
[0075] According to the above embodiment of the present disclosure, the first neutral pole
moving contact assembly 3 includes a first neutral pole moving contact 3-1, a first
neutral pole moving contact bracket 3-2 and a first neutral bracket actuating piece
3-3.
[0076] The first neutral pole moving contact 3-1 is held on the first neutral pole moving
contact bracket 3-2, and the first neutral pole bracket actuating piece 3-3 is connected
to the first neutral pole moving contact bracket 3-2, for example, by splines as shown
in fig. 2.
[0077] The second neutral pole moving contact assembly 5 includes a second neutral pole
moving contact 5-1, a second neutral pole moving contact bracket 5-2 and a second
neutral pole bracket actuating piece 5-3.
[0078] The second neutral pole moving contact 5-1 is held on the second neutral pole moving
contact bracket 5-2, and the second neutral pole moving contact actuating piece 5-3
is connected to the second neutral pole moving contact bracket 5-2, for example, by
splines as shown in fig. 2.
[0079] According to the above embodiments of the present disclosure, as shown in fig. 2,
the first tie rod assembly 1 includes a first power supply first tie rod 1-1 and a
first power supply second tie rod 1-2.
[0080] The first power supply first tie rod 1-1 and the first power supply second tie rod
1-2 are connected to the first moving contact assembly 8 and can drive the first moving
contact assembly 8 to contact with or separate from the first static contact assembly
7.
[0081] The second tie rod assembly 2 includes a second power supply first tie rod 2-1 and
a second power supply second tie rod 2-2.
[0082] The second power supply first tie rod 2-1 and the second power supply second tie
rod 2-2 are connected to the second moving contact assembly 10 and can drive the second
moving contact assembly 10 to contact with or separate from the second static contact
assembly 9.
[0083] According to the above embodiments of the present disclosure, as shown in fig. 2,
fig. 3 and fig. 12, a first neutral pole first boss 3-3-1 and a first neutral pole
second boss 3-3-2 are provided on the first neutral pole bracket actuating piece 3-3
. For the purpose of clear description, the length of the first neutral pole first
boss 3-3-1 and the length of the first neutral pole second boss 3-3-2 are lengthened
in figs. 2 and 3.
[0084] The first neutral pole first boss 3-3-1 engages with the second tie rod 1-2 of the
first power supply.
[0085] The first neutral pole second boss 3-3-2 engages with the second tie rod 2-2 of the
second power supply.
[0086] A second neutral pole first boss 5-3-1 and a second neutral pole second boss 5-3-2
are arranged on the second neutral pole bracket actuating piece 5-3.
[0087] For the purpose of clear description, the length of the second neutral pole first
boss 5-3-1 and the length of the second neutral pole second boss 5-3-2 are lengthened
in figs. 2 and 3.
[0088] The first boss 5-3-1 of the second neutral pole engages with the first tie rod 2-1
of the second power supply.
[0089] The second boss 5-3-2 of the second neutral pole engages with the first tie rod 1-1
of the first power supply.
[0090] According to the above embodiments of the present disclosure, the first neutral pole
first boss 3-3-1 and the first neutral pole second boss 3-3-2 are coaxially arranged
and the diameter of the first neutral pole first boss 3-3-1 is larger than that of
the first neutral pole second boss 3-3-2.
[0091] The second neutral pole first boss 5-3-1 and the second neutral pole second boss
5-3-2 are coaxially arranged and the diameter of the second neutral pole first boss
5-3-1 is larger than that of the second neutral pole second boss 5-3-2.
[0092] According to the above embodiments of the present disclosure, an elongated closed
first power supply first tie rod hole 1-1-1 is provided on the first power supply
first tie rod 1-1.
[0093] The first power supply second tie rod 1-2 is provided with an elongated closed first
power supply second tie rod hole 1-2-1.
[0094] The length of the first power supply first tie rod hole 1-1-1 is smaller than that
of first power supply second tie rod hole 1-2-1.
[0095] The second power supply first tie rod 2-1 is provided with an elongated closed second
power supply first tie rod hole 2-1-1.
[0096] An elongated closed second power supply second tie rod hole 2-2-1 is provided on
the second power supply second tie rod 2-2.
[0097] The length of the second power supply first tie rod hole 2-1-1 is greater than that
of the second power supply second tie rod hole 2-2-1.
[0098] According to the above embodiments of the present disclosure, the first neutral pole
first boss 3-3-1 only fits in the first power supply second tie rod hole 1-2-1.
[0099] The first neutral pole second boss 3-3-2 fits in the second power supply second tie
rod hole 2-2-1 only.
[0100] The second neutral pole first boss 5-3-1 fits in the second power supply first tie
rod hole 2-1-1 only.
[0101] The second neutral pole second boss 5-3-2 fits in first power supply first tie rod
hole 1-1-1 only.
[0102] The length of the first power supply first tie rod hole 1-1-1 is equal to the length
of the second power supply second tie rod hole 2-2-1.
[0103] The length of the first power supply second tie rod hole 1-2-1 is equal to the length
of the second power supply first tie rod hole 2-1-1.
[0104] According to the above embodiments of the present disclosure, the first neutral pole
static contact assembly 4 includes a first neutral pole static contact incoming terminal
4-1 and a first neutral pole static contact outgoing terminal 4-2.
[0105] One end of the first neutral pole moving contact 3-1 is in contact with one of the
first neutral pole static contact incoming terminal 4-1 and the first neutral pole
static contact outgoing terminal 4-2.
[0106] The other end of the first neutral pole moving contact 3-1 can contact with or separate
from the other of the first neutral pole static contact incoming terminal 4-1 and
the first neutral pole static contact outgoing terminal 4-2.
[0107] As shown in fig. 4, one end of the first neutral pole moving contact 3-1 is always
in contact with the first neutral pole static contact outgoing terminal 4-2, while
the other end of the first neutral pole moving contact 3-1 can contact with or separate
from the first neutral pole static contact incoming terminal 4-1.
[0108] The second neutral pole static contact assembly 6 includes a second neutral pole
static contact incoming terminal 6-1 and a second neutral pole static contact outgoing
terminal 6-2.
[0109] One end of the second neutral pole moving contact 5-1 is in contact with one of the
second neutral pole static contact incoming terminal 6-1 and the second neutral pole
static contact outgoing terminal 6-2.
[0110] The other end of the second neutral pole moving contact 5-1 can contact with or separate
from the other of the second neutral pole static contact incoming terminal 6-1 and
the second neutral pole static contact outgoing terminal 6-2.
[0111] As shown in fig. 4, one end of the second neutral pole moving contact 5-1 is always
in contact with the second neutral pole static contact outgoing terminal 6-2, while
the other end of the second neutral pole moving contact 5-1 can contact or separate
from the second neutral pole static contact incoming terminal 6-1.
[0112] By changing the neutral pole from double fracture to single fracture, i.e. only one
side of the neutral pole keeps in contact, which provides the holding force of the
neutral pole at the opening position (i.e. opening limit).
[0113] It can also be understood by those skilled in the art that by widening the static
contact of the neutral pole, the opening distance is reduced, thereby increasing the
contact stroke and ensuring that the neutral pole closes before the phase poles.
[0114] In addition, the moving and static contacts of the neutral pole according to the
present disclosure can be pre-assembled into an assembly without special tools or
tooling. In this way, it has little influence on assembly difficulty and working hours.
[0115] According to the above embodiments of the present disclosure, as shown in fig. 4,
arc extinguishing grids are not provided on the first neutral pole static contact
4 and the second neutral pole static contact 6.
[0116] According to another embodiment of the present disclosure, as shown in figs. 5 to
11, the same structures in this embodiment as those in the above embodiments have
the same reference numerals. The difference between this embodiment and the above
embodiment is that the first neutral pole bracket actuating piece 3-3 and the second
neutral pole bracket actuating piece 5-3 are integrally formed and connected together
by a first connecting post 11 and a second connecting post 12, wherein in figs. 9
to 10, the first connecting post 11 and the second connecting post 12 are lengthened
for the purpose of clear description.
[0117] According to another embodiment of the present disclosure, an elongated open first
power supply first tie rod slot 1-1-2 is provided on the first power supply first
tie rod 1-1.
[0118] The first power supply second tie rod 1-2 is provided with an elongated open first
power supply second tie rod slot 1-2-2.
[0119] The length of first power supply first tie rod slot 1-1-2 is equal to the length
of the first power supply second tie rod slot 1-2-2.
[0120] The second power supply first tie rod 2-1 is provided with an elongated open second
power supply first tie rod slot 2-1-2.
[0121] An elongated open second power supply second tie rod slot 2-2-2 is provided on the
second power supply second tie rod 2-2.
[0122] The length of the second power supply first tie rod slot 2-1-2 is equal to that of
the second power supply second tie rod slot 2-2-2.
[0123] According to another embodiment of the present disclosure, the first connecting post
11 is fitted in the first power supply first tie rod slot 1-1-2 and the second power
supply first tie rod slot 2-1-2.
[0124] The second connecting post 12 is fitted in the first power supply second tie rod
slot 1-2-2 and the second power supply second tie rod slot 2-2-2.
[0125] The length of the first tie rod slot 1-1-2 of the first power supply is equal to
the length of the second tie rod slot 2-2-2 of the second power supply.
[0126] The length of the first power supply second tie rod slot 1-2-2 is equal to the length
of the second power supply first tie rod slot 2-1-2.
[0127] The first neutral pole moving contact assembly 3 and the second neutral pole moving
contact assembly 5 are connected as a whole by an intermediate turntable (that is
to say, the first and the second neutral pole bracket actuator pieces are integrally
formed and connected together through the first and second connecting columns). The
opening position of the first neutral pole moving contact assembly 3 corresponds to
the closing position of the second neutral pole moving contact assembly 5, and the
closing position of the second neutral pole moving contact assembly 5 is limited by
the contact holding force, which also limits the opening position of the first neutral
pole moving contact assembly 3. On the contrary, the opening position of the second
neutral pole moving contact assembly 5 is limited by the closing position of the first
neutral pole moving contact assembly 3.
[0128] Next, the operation sequence of the first embodiment will be described in detail
with reference to the drawings.
[0129] In fig. 1 and fig. 2, the first power supply of the dual-power automatic transfer
switch is in a closed state, that is, the first moving contact assembly 8 is in contact
with the first static contact assembly 7 (phase pole closing), and the first neutral
pole moving contact assembly 3 and the first neutral pole static contact assembly
4 are in contact (neutral pole closing). At this time, the second power supply of
the dual-power automatic transfer switch is in an opened state, that is, the second
moving contact assembly 10 is not in contact with the second static contact assembly
9 (phase pole opening) and the second neutral pole moving contact assembly 5 and the
second neutral pole static contact assembly 6 are not in contact (neutral pole opening).
The first neutral pole first boss 3-3-1 abuts against one edge of the first power
supply second tie rod hole 1-2-1 and the second neutral pole second boss 5-3-2 abuts
against one edge of the first power supply first tie rod hole 1-1-1. The second neutral
pole first boss 5-3-1 abuts against one edge of the second power supply first tie
rod hole 2-1-1 and the first neutral pole second boss 3-3-2 abuts against one edge
of the second power supply second tie rod hole 2-2-1.
[0130] When the first power supply changes from closing state to opening state, the first
tie rod 1-1 of the first power supply moves to the right and the second tie rod 1-2
of the first power supply moves to the left. The first tie rod 2-1 of the second power
supply does not move and the second tie rod 2-2 of the second power supply does not
move. The first moving contact assembly 8 and the first static contact assembly 7
start to separate (phase pole opening). Due to the existence of the first power supply
first tie rod hole 1-1-1 and the first power supply second tie rod hole 1-2-1, the
first neutral pole first boss 3-3-1 and the second neutral pole second boss 5-3-2
will not move, but will be close to the other edge of the first power supply second
tie rod hole 1-2-1 and the other edge of the first power supply first tie rod hole
1-1-1 respectively. Therefore, the first neutral pole moving contact assembly 3 and
the first neutral pole static contact assembly 4 keep in contact (neutral pole keeps
closing), the second neutral pole moving contact assembly 5 and the second neutral
pole static contact assembly 6 keep out of contact (neutral pole keeps opening), and
the second moving contact assembly 10 keeps out of contact with the second static
contact assembly 9 (phase pole opening).
[0131] When the phase pole of the first power supply is opened in place, the first neutral
pole first boss 3-3-1 abuts against the other edge of the first power supply second
tie rod hole 1-2-1, and the second neutral pole second boss 5-3-2 abuts against the
other edge of the first power supply first tie rod hole 1-1-1. The phase pole of the
second power supply starts to switch on, that is, the second power supply first tie
rod 2-1 starts to move to the right, at the same time the second power supply second
tie rod 2-2 moves to the left, but the first tie rod 1-1 of the first power supply
does not move and the second tie rod 1-2 of the first power supply does not move too.
The first tie rod hole 2-1-1 of the second power supply and the second tie rod hole
2-2-1 of the second power supply respectively actuate the second neutral pole first
boss 5-3-1 and the first neutral pole second boss 3-3-2. The first neutral pole first
boss 3-3-1 is close to the one edge of the first power supply second tie rod hole
1-2-1, and the second neutral pole second boss 5-3-2 is close to the one edge of the
first power supply first tie rod hole 1-1-1, so that the first neutral pole moving
contact assembly 3 and the first neutral pole static contact assembly 4 are separated
(neutral pole opening) and the second neutral pole moving contact assembly 5 contacts
with the second neutral pole static contact assembly 6(neutral pole opening). The
second moving contact assembly 10 is in contact with the second static contact assembly
9 (phase pole closing), while the first moving contact assembly 8 is not in contact
with the first static contact assembly 7 (phase pole opening).
[0132] Through the above steps, the transition from the closing state of the first power
supply of the dual-power automatic transfer switch to the opening state and then to
the closing state of the second power supply of the dual-power automatic transfer
switch is completed.
[0133] Those skilled in the art can understand that the transition process from the closing
state of the second power supply of the dual-power automatic transfer switch to the
opening state and then to the closing state of the first power supply of the dual-power
automatic transfer switch is opposite to the above process.
[0134] The dual power automatic transfer switch according to the present disclosure can
drive ABC (three phase poles) + N1 / N2 (two neutral poles) at the same time when
switching on, and only drive its own ABC (three phase poles) when switching off. That
is, the switch can drive five switches (when switching on) at the same time or three
switches (when switching off) at the same time when switching once.
[0135] According to the above technology of the present disclosure, the structure is simple
and the neutral line overlapping time is short and stable during conversion.
[0136] According to another embodiment of the present disclosure, a dual-power automatic
transfer switch is provided, which includes the neutral line overlapping mechanism
as described in each embodiment above.
[0137] With reference to specific embodiments, although the present disclosure has been
described in the specification and drawings, it should be understood that various
changes can be made by those skilled in the art without departing from the scope of
the disclosure as defined in the claims, and various equivalents can be substituted
for various elements therein. Furthermore, the combination and collocation of technical
features, elements and/or functions among specific embodiments in this paper are clear,
so according to these disclosures, those skilled in the art can appreciate that the
technical features, elements and/or functions of an embodiment can be combined into
another specific embodiment as appropriate, unless otherwise described above. In addition,
according to the teaching of this disclosure, many changes can be made to adapt to
special situations or materials without departing from the scope of the essence of
this disclosure. Therefore, the present disclosure is not limited to the specific
embodiments illustrated in the drawings and the specific embodiments described in
the specification as the best mode presently contemplated for carrying out the present
disclosure, but the present disclosure is intended to include all embodiments falling
within the scope of the above description and the appended claims.
1. A neutral line overlapping mechanism for a dual power automatic transfer switch, the
dual power automatic transfer switch comprises a first static contact assembly and
a first moving contact assembly, a second static contact assembly and a second moving
contact assembly; wherein
the neutral line overlapping mechanism comprises a first tie rod assembly and a second
tie rod assembly, a first neutral pole moving contact assembly and a first neutral
pole static contact assembly, and a second neutral pole moving contact assembly and
a second neutral pole static contact assembly;
through the cooperation of the first tie rod assembly with the first moving contact
assembly, the first neutral pole moving contact assembly and the second neutral pole
moving contact assembly and the cooperation of the second tie rod assembly with the
second moving contact assembly, the second neutral pole moving contact assembly and
the first neutral pole moving contact assembly, so as to:
when the dual-power automatic transfer switch is in the dual-split position, one of
neutral poles is in the on state;
the first neutral pole moving contact assembly and the second neutral pole moving
contact assembly do not operate when the double power automatic transfer switch is
switched off;
when a first power supply of the dual-power automatic transfer switch is switched
on, the first neutral pole moving contact assembly and the first moving contact assembly
are interlocked;
when a second power supply of the dual-power automatic transfer switch is switched
on, the second neutral pole moving contact assembly and the second moving contact
assembly are interlocked.
2. The neutral line overlapping mechanism according to claim 1, wherein
the first neutral pole moving contact assembly comprises a first neutral pole moving
contact, a first neutral pole moving contact bracket and a first neutral pole bracket
actuating piece;
the first neutral pole moving contact is held on the first neutral pole moving contact
bracket, and the first neutral pole moving contact bracket actuating piece is connected
to the first neutral pole moving contact bracket;
the second neutral pole moving contact assembly comprises a second neutral pole moving
contact, a second neutral pole moving contact bracket and a second neutral pole bracket
actuating piece;
the second neutral pole moving contact is held on the second neutral pole moving contact
bracket, and the second neutral pole bracket actuating piece is connected to the second
neutral pole moving contact bracket.
3. The neutral line overlapping mechanism according to claim 1 or 2, wherein
the first tie rod assembly comprises a first power supply first tie rod and a first
power supply second tie rod;
the first power supply first tie rod and the first power supply second tie rod are
connected to the first moving contact assembly and can drive the first moving contact
assembly to contact with or separate from the first static contact assembly;
the second tie rod assembly comprises a second power supply first tie rod and a second
power supply second tie rod;
the second power supply first tie rod and the second power supply second tie rod are
connected to the second moving contact assembly and can drive the second moving contact
assembly to contact with or separate from the second static contact assembly.
4. The neutral line overlapping mechanism according to claim 3, wherein
a first neutral pole first boss and a first neutral pole second boss are arranged
on the first neutral pole bracket actuating piece;
the first neutral pole first boss engages with the second tie rod of the first power
supply;
the first neutral pole second boss engages with the second tie rod of the second power
supply;
a second neutral pole first boss and a second neutral pole second boss are arranged
on the second neutral pole bracket actuating piece;
the first boss of the second neutral pole engages with the first tie rod of the second
power supply;
the second boss of the second neutral pole engages with the first tie rod of the first
power supply.
5. The neutral line overlapping mechanism according to claim 3 or 4, wherein
the first neutral pole first boss and the first neutral pole second boss are coaxially
arranged and the diameter of the first neutral pole first boss is larger than that
of the first neutral pole second boss;
the second neutral pole first boss and the second neutral pole second boss are coaxially
arranged, and the diameter of the second neutral pole first boss is larger than that
of the second neutral pole second boss.
6. The neutral line overlapping mechanism according to claim 5, wherein
an elongated closed first power supply first tie rod hole is provided on the first
power supply first tie rod;
the first power supply second tie rod is provided with an elongated closed first power
supply second tie rod hole;
the length of the first power supply first tie rod hole is smaller than that of first
power supply second tie rod hole;
the second power supply first tie rod is provided with an elongated closed second
power supply first tie rod hole;
an elongated closed second power supply second tie rod hole is provided on the second
power supply second tie rod;
the length of the second power supply first tie rod hole is greater than that of the
second power supply second tie rod hole.
7. The neutral line overlapping mechanism according to claim 6, wherein
the first neutral pole first boss fits in the first power supply second tie rod hole
only;
the first neutral pole second boss fits in the second power supply second tie rod
hole only;
the second neutral pole first boss fits in the second power supply first tie rod hole
only;
the second neutral pole second boss fits in first power supply first tie rod hole
only;
the length of the first power supply first tie rod hole is equal to the length of
the second power supply second tie rod hole;
the length of the first power supply second tie rod hole is equal to the length of
the second power supply first tie rod hole.
8. The neutral line overlapping mechanism according to claim 7, wherein
the first neutral pole static contact assembly comprises a first neutral pole static
contact incoming end and a first neutral pole static contact outgoing end;
one end of the first neutral pole moving contact is in contact with one of the incoming
end of the first neutral pole static contact and the outgoing end of the first neutral
pole static contact;
the other end of the first neutral pole moving contact can contact with or separate
from the other one of the first neutral pole static contact incoming end and the first
neutral pole static contact outgoing end;
the second neutral pole static contact assembly comprises a second neutral pole static
contact incoming end and a second neutral pole static contact outgoing end;
one end of the second neutral pole moving contact is in contact with one of the incoming
end of the second neutral pole static contact and the outgoing end of the second neutral
pole static contact;
the other end of the second neutral pole moving contact can contact with or separate
from the other one of the second neutral pole static contact incoming end and the
second neutral pole static contact outgoing end.
9. The neutral line overlapping mechanism according to any of claims 2 to 8, wherein
the first neutral pole moving contact and the second neutral pole static contact are
not provided with arc extinguishing grids.
10. The neutral line overlapping mechanism according to any of claims 2 to 9, wherein
the first neutral pole bracket actuating piece and the second neutral pole bracket
actuating piece are integrally formed and connected together through a first connecting
post and a second connecting post.
11. The neutral line overlapping mechanism according to any of claims 3 to 10, wherein
an elongated open first power supply first tie rod slot is provided on the first power
supply first tie rod;
the first power supply second tie rod is provided with an elongated open first power
supply second tie rod slot;
the length of first power supply first tie rod slot is equal to the length of the
first power supply second tie rod slot;
the second power supply first tie rod is provided with an elongated open second power
supply first tie rod slot;
an elongated open second power supply second tie rod slot is provided on the second
power supply second tie rod;
the length of the second power supply first tie rod slot is equal to that of the second
power supply second tie rod slot.
12. The neutral line overlapping mechanism according to any of claims 6 to 11, wherein
the first connecting post is fitted in the first power supply first tie rod slot and
the second power supply first tie rod slot;
the second connecting post is fitted in the first power supply second tie rod slot
and the second power supply second tie rod slot;
the length of the first tie rod slot of the first power supply is equal to the length
of the second tie rod slot of the second power supply;
the length of the first power supply second tie rod slot is equal to the length of
the second power supply first tie rod slot.
13. An automatic transfer switch with dual power supplies, wherein the automatic transfer
switch with dual power supplies comprises a neutral line overlapping mechanism according
to claim 9.